"MOST" Sales Reps in Retail Stores are transitional people otherwise one could not live on Retail wages and are not aficionado's in AVS culture and short on technology skills otherwise why would they be working for such low poverty wages?
The Sales Associate may be confusing the Smart Interface processor with the 4K upscaler and they are NOT one in the same. Would not be unusual to share the same Smart TV Platform/Processor but highly unlikely one could fake 4K upscaling especially with all the pro reviewers on the "P" series.
Perhaps he's confusing facts, there is a panel manufacturer in China that is being sued for falsely advertising 1080P TV's as UHD - that is a factual event but it's not a Vizio Provider. Vizio is in the process of switching most of their panel sources from AMTRAN to Foxconn and others - they'll only be using 10% AMTRAN in 2015.
Class Actions can be brought by virtually anyone for virtually anything.
I have met a few Sales Associates that were well intended but I'd say 90% are not up to date on their product or the future and most don't even know what CES, IFA, CEDIA are. Go into a Best Buy the third week of January and start quizzing them on new product announced at CES and most will be lost in space or parrot whatever manu rep told them during their last visit.
This isn't like the old days when Appliance Store Pro Salesmen made commissions and made a damn good living - today it's a holding place while that person is trying to make a real career move to real money as Retail is a top heavy that has poverty level trickle down money to the Sales Associates.
The only career money is at corporate not on the sales floor so please when we trash BB Sales and expect them to be AVS aficionado's or any Retail Store let's not pretend they are making any livable wages unless they are living with Mom/Dad with no household bills. However, it doesn't excuse lying about the manufacturers product.